You don’t have to be a drag queen to dress in drag, or so Cindy Sherman proves in her new exhibition at Metro Pictures. Huge photographs of well-preserved women of a certain age, presented in fine traditional frames, progress through the gallery like paintings in an ancestral hall of modern dowager queens. Oozing privilege and entitlement, Sherman’s caricatures of high society divas stare coldly out at the viewer, backed by digitally inserted environments of over-the-top vulgarity.